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Perylene-diimide derived organic photovoltaic materials

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Science China Chemistry 2022年第3期65卷 462-485页

作者： Ming Zhang Yang Bai Chenkai Sun lingwei xue Haiqiao Wang Zhi-Guo Zhang State Key Laboratory of Organic/Inorganic Composites Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China College of Chemistry and Green Catalysis CenterZhengzhou UniversityZhengzhou 450001China School of Chemical and Environmental Engineering Pingdingshan UniversityPingdingshan 467000China Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers Beijing University of Chemical TechnologyBeijing 100029China

In organic solar cells(OSCs), the material design on photovoltaic layers and interlayers has significantly contributed to the rapid progress of the device performance. Perylene-diimides(PDIs), owing to their distinct advantages of high electron affinity, high electron mobility and facial chemical modification, are being widely studied in OSCs, especially designed as photovoltaic acceptors and cathode interlayers. In this review, recent progress on those PDI derived photovoltaic materials is systematically summarized. Due to the different working mechanism in devices, the design strategies on modification of the parent PDI units towards their application as acceptors and cathode interlayers are explained. After disclosing the fundamental structure-property relationships, we disclose some common features in the design of those tailor-made PDI-based photovoltaic materials, and we also highlight the challenges and opportunities in improving their device performance in the future.

关键词： organic solar cells perylene-diimides photovoltaic acceptor cathode interlayer

Effect of furan π-bridge on the photovoltaic performance of D-A copolymers based on bi(alkylthio-thienyl)benzodithiophene and fluorobenzotriazole

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Science China Chemistry 2017年第4期60卷 537-544页

作者： Tinghai Yan Haijun Bin Yankang Yang lingwei xue Zhi-Guo Zhang Yongfang Li Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic Solids at Chinese Academy of SciencesInstitute of ChemistryChinese Academy of Sciences School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow University

The medium band gap donor-acceptor （D-A） copolymer J61 based on bi（alkylthio-thienyl）benzodithiophene as donor unit and fluorobenzotriazole as acceptor unit and thiophene as n-bridge has demonstrated excellent photovoltaic performance as donor material in nonfullerene polymer solar cells （PSCs） with narrow bandgap n-type organic semiconductor ITIC as acceptor. For studying the effect of n-bridges on the photovoltaic performance of the D-A copolymers, here we synthesized a new D-A copolymer J61-F based on the same donor and acceptor units as J61 but with furan n-bridges instead of thiophene. J61-F possesses a deeper the highest occupied molecular orbital （HOMO） level at -5.45 eV in comparison with that （-5.32 eV） of J61. The non-fullerene PSCs based on J61-F：ITIC exhibited a maximum power conversion efficiency （PCE） of 8.24% with a higher open-circuit voltage （Voc） of 0.95 V, which is benefitted from the lower-lying HOMO energy level of J61-F donor material. The results indicate that main chain engineering by changing n-bridges is another effective way to tune the electronic energy levels of the conjugated D-A copolymers for the application as donor materials in non-fullerene PSCs.

关键词： nonfullerene polymer solar cells conjugated D-A copolymers furan π-bridges

Microstructure and Properties of SemisolidA356 Alloy Strip Affected by Nozzle Temperature of a Novel Micro Fused-Casting

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Journal of Wuhan University of Technology(Materials Science) 2020年第3期35卷 653-657页

作者： LUO Xiaoqiang LI Qingbin xue lingwei LI Yanling HAN Yongjun ZHOU Yanbiao Henan Key Laboratory of Research for Central Plains Ancient Ceramics Pingdingshan UniversityPingdingshan 467000China .Insti-tute of Mechanics Chinese Academy of SciencesBeijing 100190China

The semisolid A356 alloy strip was prepared by a novel continuous micro fused-casting process. The microstructure evolution and mechanical property of A356 aluminum alloy strip with different nozzle temperatures were investigated. The nozzle temperature had great influences on the microstructure and property primarily accompanied with the crystal change in the fused-casting area through the cooling conditions. The results showed that the semisolid A356 alloy strip samples fabricated by micro fused-casting demonstrated good performances and uniform structures with the nozzle temperature at 593 ℃ and the stirring velocity at 700 r/min. The fine grains of the primary α-Al phase with average grain size of 51 μm and shape factor up to 0.71 were obtained under the micro fused-casting process, and the ultimate average vickers hardness came up to 83.39±0.89 HV, and the tensile strength and elongation of the A356 alloy strip reached 245.32 MPa and 7.85%, respectively.

关键词： semisolid A356 aluminum alloy nozzle temperature micro fused-casting

Microstructure and Properties of ZL101 Alloy Affected by Substrate Movement Speed of a Novel Semisolid Continuous Micro Fused-Casting for Metal Process

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Journal of Wuhan University of Technology(Materials Science) 2018年第3期33卷 715-719页

作者：罗晓强韩永军 LI Qingbin HU Xiaoming xue lingwei Pingdingshan University Pingdingshan 467000 China Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

A novel semisolid continuous Micro Fused-Casting additive manufacturing technology for producing a ZL101 alloy strip was developed, Micro Fused-Casting means that the semisolid metal slurry was pressed out from the outlet of bottom of crucible to the movable plate. The degree of sub-cooling was easily provided by movement of substrate in the micro fused-casting area. Under the aid of 3 D manufacturing software, the ZL101 alloy strip was solidified and formed layer by layer. The microstructure and properties of ZL101 semisolid slurry were improved by the cooling conditions. The results showed that the ZL101 alloy strip samples fabricated by Micro Fused-Casting had uniform structures and good performances with the substrate movement speed at 20 mm/s and the temperature at 590 ℃, the ultimate tensile strength and elongation of the ZL101 alloy strip reached 242.59 MPa and 7.71%, while the average Vickers hardness was 82.55 HV.

关键词： micro fused-casting ZL101 alloy semisolid substrate movement speed additive manufacturing

Alkoxy substituted benzodithiophene-alt-fluorobenzotriazole copolymer as donor in non-fullerene polymer solar cells

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Science China Chemistry 2016年第10期59卷 1317-1322页

作者： Haijun Bin Lian Zhong Zhi-Guo Zhang Liang Gao Yankang Yang lingwei xue Jing Zhang Zhanjun Zhang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

A new benzodithiophene （BDT）-alt-fluorobenzotriazole （FBTA） D-A copolymer J40 was designed and synthesized by introducing 2-octyldodecyloxy side chains on its BDT units, for expanding the family of the BDT- alt-FBTA-based copolymers and investigating the side chain effect on the photovoltaic performance of the polymer in non-fullerene polymer solar cells （PSCs）. J40 exhibits complementary absorption spectra and matched electronic energy levels with the n-type organic semiconductor （n-OS）（3,9-bis（2-methylene-（3-（1,1-dicyanomethylene）-indanone））-5,5,11,11-tetrakis（4-hexylphenyl）-dithieno[2,3-d：2＇,3＇-d＇]-s- indaceno[1,2-b：5,6-b＇]dithiophene）（ITIC） acceptor, and was used as polymer donor in the non-fullerene PSCs with ITIC as acceptor. The power conversion efficiency （PCE） of the PSCs based on J40：ITIC （1：1, w/w） with thermal annealing at 120 ~C for l0 min reached 6.48% with a higher open-circuit voltage （Voc） of 0.89 V. The high Voc of the PSCs is benefitted from the lower-lying highest occupied molecular orbital （HOMO） energy level of J40. Although the photovoltaic performance of the polymer J40 with alkoxy side chain is lower than that of J60 and J61 with alkylthio-thienyl conjugated side chains, the PCE of 6.48% for the J40-based device is still a relatively higher photovoltaic efficiency in the non-fullerene PSCs reported so far. The results indicate that the family of the BDT-alt-FBTA-based D-A copolymers are high performance polymer donor materials for non-fullerene PSCs and the side chain engineering plays an important role in the design of high performance polymer donors in the non-fullerene PSCs.

关键词： non-fullerene polymer solar cells conjugated D-A copolymers n-type organic semiconductor ITIC

Side-Chain Engineering of Non-Fullerene Acceptors with Trialkylsilyloxy Groups for Enhanced Photovoltaic Performancet

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Chinese Journal of Chemistry 2024年第18期42卷 2153-2160页

作者： Qingyuan Wang Qi Chen Shixin Meng Li Tian Haiqiao Wang Yu Chen Zitong Liu lingwei xue Zhi-Guo Zhang State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijingUniversityof Chemical TechnologyBeijing 100029China School of Materials Science and Engineering Henan University of TechnologyZhengzhouHenan 450001China Beijing Engineering Research Center for the Synthesis and Applications of Waterborne Polymers Beijing University of Chemical TechnologyBeijing100029China The Institute of High Energy Physics Chinese Academy of SciencesBejing 100049China state Key Laboratory of Applied Organic Chemistry(SKLAoc) College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhouGansu730000China Yaoshan Laboratory Pingdingshan UniversityPingdingshanHenan 467000China

Side-chain engineering has emerged as a highly effective strategy for tailoring the aggregation behavior and charge transport properties of non-fullerene small molecule acceptors(SMAs).In this study,we designed and synthesized two SMAs,namely BTPSi-Bu and BTPSi-Pr,respectively incorporating tributylsilyloxy and trisopropylsilyloxy groups in their outer ***,BTPSi-Bu exhibited better planarity,crystallization,and favorable phase separation when paired with PM6 donor polymer compared to its counterpart,*** resulting organic solar cells,utilizing the PM6:BTPSi-Bu blend,demonstrated a remarkable power conversion efficiency of 17.41%and a high open-circuit voltage of 0.859 *** findings underscore the significance of integrating trialkylsilyloxy side chains into SMAs as a rational design approach for enhancing the performance of photovoltaic systems.

关键词： Organic solar cells Non-fullerene acceptors Oligomers Side-chain engineering Energy conversion Synthesis design Donor-acceptor systems

氟掺杂对LiMn_(0.8)Fe_(0.2)PO_(4)/C正极材料电化学性能的影响

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无机盐工业 2024年第11期56卷 45-50页

作者：刘佳盛罗晓强侯翠红薛灵伟郑州大学化工学院河南郑州450001 平顶山学院化学与环境工程学院河南平顶山467000

随着新能源汽车和锂离子电池的普及和推广,磷酸锰铁锂材料作为锂离子电池正极材料,其电化学性能亟待进一步优化。在诸多磷酸锰铁锂改性手段中,阴离子位取代的研究较少。LiF作为掺杂剂,通过F-取代PO_(4)^(3-)部分氧位的改性方法可提高磷... 详细信息

随着新能源汽车和锂离子电池的普及和推广,磷酸锰铁锂材料作为锂离子电池正极材料,其电化学性能亟待进一步优化。在诸多磷酸锰铁锂改性手段中,阴离子位取代的研究较少。LiF作为掺杂剂,通过F-取代PO_(4)^(3-)部分氧位的改性方法可提高磷酸锰铁锂的电化学性能。以Li_(2)CO_(3)、LiF、MnCO_(3)、FeC_(2)O_(4)·2H_(2)O、NH_(4)H_(2)PO_(4)和蔗糖为原料,通过高温固相法制备LiMn_(0.8)Fe_(0.2)PO_(4)−X_(F2)X/C(X=0.003、0.005、0.01、0.02)材料,并研究了不同氟掺杂量对LiMn_(0.8)Fe_(0.2)PO_(4)/C正极材料电化学性能的影响。结果表明,氟的掺入仅对LiMn_(0.8)Fe_(0.2)PO_(4)/C的晶格参数有轻微的改变,而对粒径影响不大;在电化学方面,氟掺杂使LiMn_(0.8)Fe_(0.2)PO_(4)/C具有良好的可逆容量和倍率性能,LiMn_(0.8)Fe_(0.2)PO_(3.99)F_(0.02)/C表现出最高的初始容量和最佳的倍率性能,0.1C和5C倍率下的放电比容量分别为155.1 mA·h/g和128.6 mA·h/g。相较于未掺杂的LiMnFePO_(4),LiMn_(0.8)Fe_(0.2)PO_(3.99)F_(0.02)/C在1C下循环500次后容量保持率从73.3%提高到96.1%。

关键词：电化学性能磷酸锰铁锂正极材料氟掺杂

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食品添加剂在研发中的应用与挑战探究

食品安全导刊 2024年第10期 142-144页

作者：秦新磊薛凌薇大咖国际食品有限公司河南焦作454850

食品添加剂是食品工业中应用最广的一种助剂,近几年来一直备受关注。将其应用于食品生产,不仅能延长食品的保质期,还能改善食品的口感、色泽、营养价值及功能。但是随着人们食品安全与健康意识的日益提高,其负面效应也逐渐显露出来。本... 详细信息

食品添加剂是食品工业中应用最广的一种助剂,近几年来一直备受关注。将其应用于食品生产,不仅能延长食品的保质期,还能改善食品的口感、色泽、营养价值及功能。但是随着人们食品安全与健康意识的日益提高,其负面效应也逐渐显露出来。本文主要探究在食品添加剂研发中存在的挑战,提出食品添加剂在食品研发中的应用要点,意在为我国食品安全形势的稳定提供助力。

关键词：食品添加剂研发应用与挑战

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“任务驱动”在有机化学教学中的应用

广东化工 2011年第2期38卷 191-192,194页

作者：薛灵伟王俊俊平顶山学院河南平顶山467000

从"任务驱动"教学法的基本特征入手,结合教学实际阐述了该教学法在有机化学课堂教学中的具体应用,并对在教学过程中有效实施该教学法进行了简单的探讨。

关键词：任务驱动有机化学应用